Stackable mug



FIG. 1 is a perspective view of a stackable mug in accordance with thepresent invention;

FIG. 2 is a top plan view of the stackable mug in FIG. 1;

FIG. 3 is an elevational left-side view of the stackable mug in FIG. 1;

FIG. 4 is an elevational front view of the stackable mug in FIG. 1;

FIG. 5 is an elevationa right-side view of the stackable mug in FIG. 1;and

FIG. 6 is an elevational rear view of the stackable mug in FIG. 1; and,

FIG. 7 is a bottom plan view of the stackable mug in FIG. 1.

The broken lines in the drawings depict portions of the stackable mugthat form no part of the claimed design.

CLAIM The ornamental design for a stackable mug, as shown and described. 